Search results for "Note"
showing 10 items of 10709 documents
Aligned microcontact printing of biomolecules on microelectronic device surfaces
2001
Microcontact printing (/spl mu/CP) of extracellular matrix proteins is a fascinating approach to control cell positioning and outgrowth, which is essential in the development of applications ranging from cellular biosensors to tissue engineering. Microelectronic devices can be used to detect the activity from a large number of recording sites over the long term. However, signals from cells can only be recorded at small sensitive spots. Here, the authors present an innovative setup to perform aligned /spl mu/CP of extracellular matrix proteins on microelectronic devices in order to guide the growth of electrogenic cells specifically to these sensitive spots. The authors' system is based on t…
How Islamic are young Muslim people’s poems?
2019
In this article, I investigate poetry written by two young Muslim people during their spare time. Adopting Shahab Ahmed’s (2016) understanding of Islamic in its plenitude and complexity, I ask how Islamic their texts are. The participants, Neda and Mohammed (both pseudonyms), grew up in Islamic countries where they were socialised in faith literacy practices, including practices around sacred and devotional texts, before moving to Norway in their teens. The data used for this article were collected during two linguistic ethnographies and include poems written in and outside of school, fieldnotes from classroom observations and transcripts from multiple semi-structured interviews. The interv…
Bioaugmentācijas izmantošana farmācijas notekūdeņu attīrīšanas efektivitātes uzlabošanai
2015
Šajā darbā tika pētīta no farmācijas attīrīšanas iekārtām izdalītu, dabisku mikroorganismu spēja degradēt specifiskus farmakoloģijas savienojumus tīrkultūru veidā, kā arī bioaugmentācijas procesā simulētos reālos vide apstākļos. Izmantotās metodes ļauj salīdzinoši novērtēt mikroorganismu koncentrāciju un dinamiku vidē. Tika parādīts, ka mikroorganismu aktivitāte testa sistēmas apstākļos ir būtiski atšķirīga no in vitro. Konstatēts, ka bioaugmentācijas celmiem ir augsta izskalošanas pakāpe un ir nepieciešams veikt papildus pasākumus, lai to samazinātu. Ir grūti paredzēt pievienoto mikroorganismu efektu uz eksistējošo mikrofloru. Sēnei Gibberella indica ir augsts potenciāls tikt izmantotai fa…
Emulating the Effects of Radiation-Induced Soft-Errors for the Reliability Assessment of Neural Networks
2021
International audience; Convolutional Neural Networks (CNNs) are currently one of the most widely used predictive models in machine learning. Recent studies have demonstrated that hardware faults induced by radiation fields, including cosmic rays, may significantly impact the CNN inference leading to wrong predictions. Therefore, ensuring the reliability of CNNs is crucial, especially for safety-critical systems. In the literature, several works propose reliability assessments of CNNs mainly based on statistically injected faults. This work presents a software emulator capable of injecting real faults retrieved from radiation tests. Specifically, from the device characterisation of a DRAM m…
Performance analysis of dual-pump nonlinear amplifying loop mirror mode-locked all-fibre laser
2019
We numerically characterise, in the three-dimensional space of adjustable cavity parameters, the performance of a recently reported layout of a flexible figure-8 laser having two independently pumped segments of active fibre in its bidirectional ring (Smirnov et al 2017 Opt. Lett. 42 1732–5). We show that this optimisation problem can be efficiently addressed by applying a regression model based on a neural-network algorithm.
Influence of organic material and sample parameters on the surface potential in Kelvin probe measurements
2019
Financial support provided by ERDF 1.1.1.1 activity project Nr. 1.1.1.1/16/A/046 “Application assessment of novel organic materials by prototyping of photonic devices” as well as Scientific Research Project for Students and Young Researchers Nr. SJZ2016/20 realized at the Institute of Solid State Physics, University of Latvia is greatly acknowledged.
Uzņēmuma SIA "Zivtiņa" kredītspējas analīze un tās noteikšana
2020
Darba temats ir uzņēmuma “SIA “Zivtiņa” kredītspēja analīze un tās noteikšana”. Darba mērķis balstoties uz kredītspējas teorētiskiem aspektiem novērtēt SIA “Zivtiņa” tekošo kredītspēju, nākotnes kredītriskus, ka arī izstrādāt priekšlikumus uzņēmuma SIA “Zivtiņa” kredītspējas uzlabošanai. Darbs sastāv no 3 nodaļām. Darba 1. nodaļā autors ir izskatījis teorētisko informāciju, lai gūt priekšstatu par kredītspējas būtību un to uzlabošanas iespējam. Darba 2.nodaļā autors izskata uzņēmumu SIA “Zivtiņa”, lai noteikt pētāmo objektu un gūt priekšstatu par uzņēmuma tēlu. Darba 3.nodaļā praktiski pielieto teorētisku informāciju par kredītspējas noteikšanu, lai noteikt uzņēmuma kredītspēju un izstrādāt…
Chronic neural probe for simultaneous recording of single-unit, multi-unit, and local field potential activity from multiple brain sites
2017
Drug resistant focal epilepsy can be treated by resecting the epileptic focus requiring a precise focus localisation using stereoelectroencephalography (SEEG) probes. As commercial SEEG probes offer only a limited spatial resolution, probes of higher channel count and design freedom enabling the incorporation of macro and microelectrodes would help increasing spatial resolution and thus open new perspectives for investigating mechanisms underlying focal epilepsy and its treatment. This work describes a new fabrication process for SEEG probes with materials and dimensions similar to clinical probes enabling recording single neuron activity at high spatial resolution.Polyimide is used as a bi…
Comparison between Focused Electron/Ion Beam-Induced Deposition at Room Temperature and under Cryogenic Conditions
2019
This article belongs to the Special Issue Multi-Dimensional Direct-Write Nanofabrication.
Mechanics of invagination and folding: Hybridized instabilities when one soft tissue grows on another
2015
We address the folding induced by differential growth in soft layered solids via an elementary model that consists of a soft growing neo-Hookean elastic layer adhered to a deep elastic substrate. As the layer/substrate modulus ratio is varied from above unity towards zero we find a first transition from supercritical smooth folding followed by cusping of the valleys to direct subcritical cusped folding, then another to supercritical cusped folding. Beyond threshold the high amplitude fold spacing converges to about four layer thicknesses for many modulus ratios. In three dimensions the instability gives rise to a wide variety of morphologies, including almost degenerate zigzag and triple-ju…